Chapter 3 - Undo Handling
[Some interpreters do not allocate enough memory to allow Counterfeit Monkey to UNDO successfully after a turn has gone wrong. To make matters worse, sometimes UNDO stops working partway through a playthrough when it did work at the beginning.
Ultra Undo is an extension kindly written by Dannii Willis to use external file recording to ensure that UNDO remains available.]
Include Ultra Undo by Dannii Willis.